Performance testing should reference the class and the corresponding valve devices such as JB / T8528-97 common type valve electric device technology, GB / T13927-92 universal valve pressure test, etc., Shanghai Guanlong Valve Machinery Co., Ltd., if there is no standard can also refer to almost the same type, the main valve is a leakage indicator, water inspection, observation through the bubble size and location of the leak, often used in the production of the factory inspection. There are gas inspection, to see the size of the leak by the pressure or flow, often used in the laboratory type testing. Followed by the thrust of the index, the valve can be driven by electric or pneumatic detection device with a sensor. By repeating the operation test of the durability of the valve, overvoltage ability is more important indicator. As well as the design of the required pressure loss, corrosion, and other indicators. The standard provides for different valve pressure, differential pressure levels, according to that on to do. We believe the most direct intuition is stainless steel valves never rust, will think that if we buy a rusty stainless steel valves, stainless steel that necessarily a problem. In fact, under certain conditions, stainless steel can also rust. Stainless steel has the ability to resist atmospheric oxidation, the Guangzhou Kaiheng Valve Co., Ltd., the stainless steel, while also having the ability to corrosion in acid, alkali, salt medium, namely corrosion resistance. However, the size of the corrosion resistance of stainless steel with the chemical composition of the steel itself, environmental conditions and type of media used and change. Ningbo Ai Ke Valve Co. | valves | valve provided by the Dongguan Ming Kong, the Hong Kong Science and Technology Co., Ltd. valve. Valve Co., Ltd., Dongguan Ming Kong (www.gdmgfm.com) strong, credible, butterfly and other industries in Dongguan, Guangdong has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead valve and you work out of Hong Kong into the brilliant, for a better future!